Hi John The standing water, assuming it is not coming from dripping house plumbing, is coming from one of two places: The most likely is from a gutter/downspout problem, where water is simply falling and collecting near the foundation. This may be made worse by grading around the house that doesn't slope away (look at the April issue of 'Fine Homebuilding' for a good article on this subject). The second possible source is a high water table, that rises as ground water rises (from rain or melting snow). An easy way to check the latter is to use a post hole digger and dig a hole down 30" or so near the house, then put an inverted coffee can over it, pushing the lip of the can into the ground around the hole so surface water cannot run in. Check the hole again in 24 then 48 hours. If the hole is dry, it probably isn't water table. If the hole has water in it, a high water table may be the problem...which will not be good.
However, this is most likely a gutter/drainage problem, and I would attack it there.